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US 8,985,098 B2Granted
CPR volume exchanger valve system with safety feature and methods
AssigneeAdvanced Circulatory Systems, Inc.
InventorsKeith G. Lurie, Anja Metzger, Jim Homuth
Life of this patent
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Abstract
A method for regulating gas flows into and out of a patient includes repetitively forcing respiratory gases out of the lungs. Respiratory gases are prevented from entering back into the lungs during a time between when respiratory gases are forced out of the lungs. Periodically, an oxygen-containing gas is supplied to the lungs.
Claims9
A method to perform cardiopulmonary resuscitation in a patient in cardiac arrest, the method comprising:
- providing a valve system comprising a pressure-responsive valve that is configured to be coupled to the patient's airway;
- providing at least one timing light that is configured to help guide a rescuer in performing a desired compression rate when repetitively compressing the chest;
- providing instructions to repetitively compress the chest and permit the chest to recoil a rate of about 60 to about 120 times/min by following a cadence of the timing light;
- providing instructions as to a proper depth for each chest compression;
- wherein with each compression a volume of respiratory gas is expelled from the lungs;
- wherein for a plurality of chest recoils, respiratory gases are prevented from returning to the lungs with the valve system such that over successive chest compression/chest recoil cycles there is a successive decrease in respiratory gases within the lungs thereby allowing more blood to enter the thoracic space;
- and
- providing instructions to periodically actively expand the lungs with an oxygen-containing gas.
5 more elements
A method to perform cardiopulmonary resuscitation in a patient in cardiac arrest, the method comprising:
- providing a valve system comprising a pressure-responsive valve that is configured to be coupled to the patient's airway;
- providing at least one sensor to sense at least one of:
- ventilation rate, degree of chest compression or rate of chest compression;
- providing instructions to repetitively compress the chest and permit the chest to recoil a rate of about 60 to about 120 times/min;
- providing instructions as to a proper depth for each chest compression;
- wherein with each compression a volume of respiratory gas is expelled from the lungs;
- wherein for a plurality of chest recoils, respiratory gases are prevented from returning to the lungs such that over successive chest compression/chest recoil cycles there is a successive decrease in respiratory gases within the lungs thereby allowing more blood to enter the thoracic space;
- providing instructions to periodically actively expand the lungs with an oxygen-containing gas;
- and
- wherein the sensor is configured to provide feedback to a rescuer as to whether the ventilation rate, degree of chest compression and/or rate of chest compression are proper.
7 more elements
Dependencies are inferred from the claim text.